Christopher Guest has brought aboard several familiar actors to his new HBO comedy, Family Tree, with Fred Willard, Ed Begley Jr. and Michael McKean all signing onto the project. All three actors have worked with Guest numerous times before, including in This is Spinal Tap.

The series stars Chris O'Dowd as an aimless 30-year-old man, Tom Chadwick, who goes on a journey to discover his family roots after inheriting a box of heirlooms from his great-aunt.

According to The Wrap, Begley has been cast as Tom's Uncle Andy, with Willard cast as Tom's neighbor Mike. McKean, meanwhile, will assume the role of Tom's father, Keith.

Frequent Guest collaborator Jim Piddock created and wrote the show, and he will also executive produce, while Guest directs.